TY  - BOOK
AU  - John
TI  - The Integrated Services Digital Network: From Concept To Application.
SN  - 0-07-045268-7
U1  - 004.6 
PY  - 1987///
CY  - London
PB  - Pitman
KW  - GENERAL
N1  - Shelf No. 9.2; Condition: GOOD
ER  -